[Bug 75394] System hangs randomly with error message: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75394

--- Comment #45 from Chris <cpollock at embarqmail.com> ---
Again another lockup this evening at 19:16:40, 20 Feb 2015 while still running
the 3.19.0 kernel. And again the 'Hangcheck' error did not make itself known,
what my syslog shows for this time period before the CTRL>ALT>F1 is:

Feb 20 19:17:01 localhost CRON[29189]: (root) CMD ( cd / && run-parts --report
/etc/cron.hourly)
Feb 20 19:17:28 localhost kernel: [129187.759473]
[drm:intel_crtc_cursor_set_obj] cursor off
Feb 20 19:17:28 localhost kernel: [129187.759479] [drm:g4x_check_srwm] SR
watermark: display plane 92, cursor 2
Feb 20 19:17:28 localhost kernel: [129187.759481] [drm:g4x_check_srwm] display
watermark is too large(92/63), disabling
Feb 20 19:17:28 localhost kernel: [129187.759483] [drm:intel_set_memory_cxsr]
memory self-refresh is disabled
Feb 20 19:17:28 localhost kernel: [129187.759485] [drm:g4x_update_wm] Setting
FIFO watermarks - A: plane=40, cursor=2, B: plane=2, cursor=2, SR: plane=0,
cursor=0
Feb 20 19:17:29 localhost kernel: [129189.173796] [drm:intel_crtc_set_config]
[CRTC:9] [FB:47] #connectors=1 (x y) (0 0)
Feb 20 19:17:29 localhost kernel: [129189.173800]
[drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:9],
mode_changed=0, fb_changed=1
Feb 20 19:17:29 localhost kernel: [129189.173803]
[drm:intel_modeset_stage_output_state] [CONNECTOR:13:VGA-1] to [CRTC:9]
Feb 20 19:17:29 localhost kernel: [129189.173805]
[drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1,
disable: 0
Feb 20 19:17:29 localhost kernel: [129189.173808]
[drm:connected_sink_compute_bpp] [CONNECTOR:13:VGA-1] checking for sink bpp
constrains
Feb 20 19:17:29 localhost kernel: [129189.173810]
[drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
Feb 20 19:17:29 localhost kernel: [129189.173812] [drm:intel_dump_pipe_config]
[CRTC:9][modeset] config for pipe A
Feb 20 19:17:29 localhost kernel: [129189.173813] [drm:intel_dump_pipe_config]
cpu_transcoder: A
Feb 20 19:17:29 localhost kernel: [129189.173814] [drm:intel_dump_pipe_config]
pipe bpp: 24, dithering: 0
Feb 20 19:17:29 localhost kernel: [129189.173816] [drm:intel_dump_pipe_config]
fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 20 19:17:29 localhost kernel: [129189.173817] [drm:intel_dump_pipe_config]
dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 20 19:17:29 localhost kernel: [129189.173819] [drm:intel_dump_pipe_config]
dp: 0, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
Feb 20 19:17:29 localhost kernel: [129189.173820] [drm:intel_dump_pipe_config]
audio: 0, infoframes: 0
Feb 20 19:17:29 localhost kernel: [129189.173820] [drm:intel_dump_pipe_config]
requested mode:
Feb 20 19:17:29 localhost kernel: [129189.173823]
[drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728
1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 20 19:17:29 localhost kernel: [129189.173824] [drm:intel_dump_pipe_config]
adjusted mode:
Feb 20 19:17:29 localhost kernel: [129189.173827]
[drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728
1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 20 19:17:29 localhost kernel: [129189.173829] [drm:intel_dump_crtc_timings]
crtc timings: 119000 1680 1728 1760 1840 1050 1053 1059 1080, type: 0x48 flags:
0xa
Feb 20 19:17:29 localhost kernel: [129189.173830] [drm:intel_dump_pipe_config]
port clock: 119000
Feb 20 19:17:29 localhost kernel: [129189.173831] [drm:intel_dump_pipe_config]
pipe src size: 1680x1050
Feb 20 19:17:29 localhost kernel: [129189.173832] [drm:intel_dump_pipe_config]
gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
Feb 20 19:17:29 localhost kernel: [129189.173834] [drm:intel_dump_pipe_config]
pch pfit: pos: 0x00000000, size: 0x00000000, disabled
Feb 20 19:17:29 localhost kernel: [129189.173835] [drm:intel_dump_pipe_config]
ips: 0
Feb 20 19:17:29 localhost kernel: [129189.173836] [drm:intel_dump_pipe_config]
double wide: 0
Feb 20 19:17:29 localhost kernel: [129189.173846]
[drm:i9xx_update_primary_plane] Writing base 00546000 00000000 0 0 6720

I have no idea as to whether I should submit a new bug or what. Looking for
some advice here from someone.

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